Absignoe of one-half



T. N. LARSEN. Well-Drilling Apparatus.

No. 232 ,l9l. Patented Sept.'l4,1880.

. W fl l lizewwem r I I I I I r I r I N. PETERS, FHOTO-UTHOGRAPNER. WASHINGTON. D C

Unite "rATns t FFEGE).

THEODORE N. LARSEN, OF ST. ANSGAR, IOWA, ASSIGNOR OF ONE-HALF, OF HIS RIGHT TO ALONZO WARDALL, OF SAME PLACE.

WELL- D RI LLING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 232,191, dated September 14, 1880.

Application filed September 27, 1879.

To all whom it may concern Be it known that I, THEODORE N. LARSEN, of St-.Ansgar,i n the county of Mitch ell an (1 State of Iowa, have invented certain new and use- 5 ful Improvements in Well-Drilling Apparatus; and I do hereby declare that the following is a full, clear, and exact description of the construetion and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l. is a plan view of the apparatus arranged for drilling through rock. Fig. 2 is an elevation of one side of the same. Fig. 8isan enlarged sectional detail of the revolving two throw cam-levers and the vibrating ropeactuatin g lever and rope-drum.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to machinery which is designed for boring into the earth and drilling through strata of rock in the formation of wells; and the nature of my invention consists in a novel combination of a horse-power, .2 a revolving tripping-cam, avibrating lever which moves the drill-carrying rope, and a paying-off and elevating contrivance, arranged as will be hereinafter explained.

The following is a description of the con- 0 struction and operation of my improved apparatus.

In the annexed drawings, A designates the frame of a horse power, which is strongly braced and properly secured to the ground, so

3 5 that while it will be substantially fixed it can be readily removed.

B is a vertical shaft, which has fixed on it a horizontal master-wheel, B, the teeth of which engage with a pinion-wheel, a, keyed on a horizontal shaft, G. Shaft B has two drums, B b, fast on it. The upper drum, 1), has bearing against it the bifurcated end of a brake, B which is secured to a sweep, D, and

serves as a brace for this sweep, and also as a friction-brake, to be hereinafter explained.

The pivotal eye 0 of the sweep D is free to revolve around the upper end of the shaft 13, and immediately above the eye 0 is a ratchetwheel, d, which is fast on shaft B, and with which wheel engages a pawl, d, which is held in contact with its toothed periphery by means of a spring, 0.

By retracting pawl d the shaft B is free to turn to the right or left independent of the sweep D. When pawl d is engaged with its ratchetwheel-the shaft B may be moved around with its sweep.

Shaft O is journaled in bearings on a frame, E, which can be detached from frame A and removed out of the way when desired.

On the shaft 0 is keyed a long two-throw cam-lever, F, and a large spur-wheel, G. The

lever F is composed of two bent arms, which are provided at and near their angular end with anti-friction rollers f, for the purpose of acting on and giving a vibrating motion to a lever, H, which has its fulcrum at g on the sill beams of frame F, and which bears a grooved pulley, h, under which a ropeyi, passes freely. The spur-wheel G engages with a pinion, j, on a shaft which carries a balancewheel, I, for equalizing the movements of the machine. The rope 73 passes from pulley 7b to and is wound on a drum, J, and it also passes from said pulley h underneath pulleys 70 7c and 75 over a pulley, 70 centrally suspended from the upper end of a derrick, L, for the purpose of allowing the ropez' to be attached to a drilling or boring tool.

The shaft of the drum or Windlass J is jour- 8o naled on frame E, and bears on one end a spur-wheel, l, which engages with a pinion, m, on the shaftM of a ratchet-wheel, n, with which latter a gravitatin g pawl, 0, engages. By releasing ratchetwheel n from pawl o the drum 8 5 J can be rotated by crank'keys applied on the ends of shaft M, and the rope iwound upon it or paid 011 from it at pleasure.

It will be. seen from the above description that when the sweep D is moved around in the direction of the arrow on Fig. 1, and pawl d is engaged with ratchet-wheel d, the two-throw cam-lever Fwill act on lever H, which,inturn, will give a rapid vertical motion to the drill P, attached to the end of the rope i, which can 5 be paid out as the work progresses by unwinding it from the drum J.

The derrick L, which may be constructed in any suitable manner, will, in practice, while using the drill,be located so far from the frame E that the animals hitched to the sweep D can wall: between said derrick and frame in their trzwel around.

Having described my invention, I claim- 1. The drums B Z) on the shaft B of sweep D, in combination with Wheels B, a cam-lever, F, lever H, pulleys h 7; 70 k rope 1i, drum J 7 and derrick L, all arranged for operating substantially as described.

2. The brake B on s\veepD,in combination with the drums 1) B shaft B, ratchet-Wheel (I, and pawl d, as described.

VVit-ness myhand in the matter of my application for improvements in well-boring apparatus.

THEODORE N. LARSEN.

Witnesses ALONZO WARDALL, FRANK WILLIAMS. 

